Lisheng, Have a look at the javadoc for the Sort object: Valid Types of Values
There are three possible kinds of term values which may be put into sorting fields: Integers, Floats, or Strings. Unless SortField objects are specified, the type of value in the field is determined by parsing the first term in the field. Thus, if you know what type of a value yoru field has, use SortField and explicitly set it. Also, instantiate Sort and SortField only once instead of in each call to search(....). Otis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lucene Consulting - http://lucene-consulting.com/ ----- Original Message ---- From: "Zhang, Lisheng" <[EMAIL PROTECTED]> To: java-user@lucene.apache.org Sent: Saturday, April 28, 2007 9:04:23 PM Subject: Sort in Lucene 1.4.3 Hi, I encountered one problem in lucene 1.4.3: I called Searcher.search(<query>, new Sort("myfiled"); In "myfiled", most values looks like number "123456" or sth similiar, but one field contains a value "Just a TRY", then I got error: java.lang.ClassCastException at org.pache.lucene.search.FieldDocSortedHitQueue.lssThan (FieldDocSortedHitQueue.java:129) It seems that lucene judged this field as number so it cannot cast one particular value as String? To me if client did not specify sorting field type, we should treat it just as String? Thanks very much for helps and best regards, Lisheng --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
